Proceedings of the 16th annual conference on Computer graphics and interactive techniques最新文献_第3页

Layered construction for deformable animated characters 分层结构可变形的动画人物

Proceedings of the 16th annual conference on Computer graphics and interactive techniques Pub Date : 1989-07-01 DOI: 10.1145/74333.74358

John E. Chadwick, D. Haumann, Richard E. Parent

{"title":"Layered construction for deformable animated characters","authors":"John E. Chadwick, D. Haumann, Richard E. Parent","doi":"10.1145/74333.74358","DOIUrl":"https://doi.org/10.1145/74333.74358","url":null,"abstract":"A methodology is proposed for creating and animating computer generated characters which combines recent research advances in robotics, physically based modeling and geometric modeling. The control points of geometric modeling deformations are constrained by an underlying articulated robotics skeleton. These deformations are tailored by the animator and act as a muscle layer to provide automatic squash and stretch behavior of the surface geometry. A hierarchy of composite deformations provides the animator with a multi-layered approach to defining both local and global transition of the character's shape. The muscle deformations determine the resulting geometric surface of the character. This approach provides independent representation of articulation from surface geometry, supports higher level motion control based on various computational models, as well as a consistent, uniform character representation which can be tuned and tweaked by the animator to meet very precise expressive qualities. A prototype system (Critter) currently under development demonstrates research results towards layered construction of deformable animated characters.","PeriodicalId":422743,"journal":{"name":"Proceedings of the 16th annual conference on Computer graphics and interactive techniques","volume":"28 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1989-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114843131","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 506

Near real-time shadow generation using BSP trees 接近实时的阴影生成使用BSP树

Proceedings of the 16th annual conference on Computer graphics and interactive techniques Pub Date : 1989-07-01 DOI: 10.1145/74333.74343

Norman Chin, Steven K. Feiner

引用次数: 190

Good vibrations: modal dynamics for graphics and animation 良好的振动:图形和动画的模态动力学

Proceedings of the 16th annual conference on Computer graphics and interactive techniques Pub Date : 1989-07-01 DOI: 10.1145/74333.74355

A. Pentland, John Williams

引用次数: 494

The synthesis and rendering of eroded fractal terrains 侵蚀分形地形的合成与绘制

Proceedings of the 16th annual conference on Computer graphics and interactive techniques Pub Date : 1989-07-01 DOI: 10.1145/74333.74337

F. K. Musgrave, Craig E. Kolb, R. Mace

{"title":"The synthesis and rendering of eroded fractal terrains","authors":"F. K. Musgrave, Craig E. Kolb, R. Mace","doi":"10.1145/74333.74337","DOIUrl":"https://doi.org/10.1145/74333.74337","url":null,"abstract":"In standard fractal terrain models based on fractional Brownian motion the statistical character of the surface is, by design, the same everywhere. A new approach to the synthesis of fractal terrain height fields is presented which, in contrast to previous techniques, features locally independent control of the frequencies composing the surface, and thus local control of fractal dimension and other statistical characteristics. The new technique, termed noise synthesis, is intermediate in difficulty of implementation, between simple stochastic subdivision and Fourier filtering or generalized stochastic subdivision, and does not suffer the drawbacks of creases or periodicity. Varying the local crossover scale of fractal character or the fractal dimension with altitude or other functions yields more realistic first approximations to eroded landscapes. A simple physical erosion model is then suggested which simulates hydraulic and thermal erosion processes to create gloabl stream/valley networks and talus slopes. Finally, an efficient ray tracing algorithm for general height fields, of which most fractal terrains are a subset, is presented.","PeriodicalId":422743,"journal":{"name":"Proceedings of the 16th annual conference on Computer graphics and interactive techniques","volume":"33 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1989-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"116580900","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 482

Antialiased ray tracing by adaptive progressive refinement 自适应渐进细化的抗锯齿光线跟踪

Proceedings of the 16th annual conference on Computer graphics and interactive techniques Pub Date : 1989-07-01 DOI: 10.1145/74333.74362

J. Painter, K. Sloan

引用次数: 199

Guaranteed ray intersections with implicit surfaces 保证射线与隐式曲面相交

Proceedings of the 16th annual conference on Computer graphics and interactive techniques Pub Date : 1989-07-01 DOI: 10.1145/74333.74364

D. Kalra, A. Barr

引用次数: 218

Rendering cubic curves and surfaces with integer adaptive forward differencing 用整数自适应正差分绘制三次曲线和曲面

Proceedings of the 16th annual conference on Computer graphics and interactive techniques Pub Date : 1989-07-01 DOI: 10.1145/74333.74349

Sheue-Ling Chang, M. Shantz, R. Rocchetti

引用次数: 41

Analytical methods for dynamic simulation of non-penetrating rigid bodies 非穿透刚体动力学模拟的解析方法

Proceedings of the 16th annual conference on Computer graphics and interactive techniques Pub Date : 1989-07-01 DOI: 10.1145/74333.74356

D. Baraff

引用次数: 548

Three dimensional Terrain modeling and display for environmental assessment 面向环境评价的三维地形建模与显示

Proceedings of the 16th annual conference on Computer graphics and interactive techniques Pub Date : 1989-07-01 DOI: 10.1145/74333.74354

K. Kaneda, F. Kato, E. Nakamae, T. Nishita, H. Tanaka, T. Noguchi

引用次数: 64

Parameterized Ray-tracing 参数化的演

Proceedings of the 16th annual conference on Computer graphics and interactive techniques Pub Date : 1989-07-01 DOI: 10.1145/74333.74365

C. Séquin, E. Smyrl

引用次数: 79